If you look at the original lesson instructions, no space is needed between in front of the colon and you should identify the CHILD element, which is a paragraph:
Would turn every paragraph that is the second child of its parent element red.
The element that is the child goes before :nth-child; its parent element is the element that contains it."
So the solution should be:
Problem is, I only get activity if I use "p:nth-child(3)" [changing to 36px will give the paragraph larger letters], but then the error message tells me that the current paragraph is undefined, If I use (4), I get no changes in the font and the SAME error message. What am I missing?
<link type="text/css" rel="stylesheet" href="stylesheet.css"/>
<h3 class="fancy";>Better put a heading here.<h3>
<p class="fancy";>It'd be nice if you were clearer about what you want...</p>
<p id="serious";>I'll assume you want something written here, too...</p>
<p>Final bit of writing goes here.</p>